Colorado 2WD L5-3.5L VIN 6 (2005)
Visually inspect the sunroof glass. The glass should be flush to the sunroof frame. If the glass (1) like in the graphic above is not flush make sure no parts
are broken or missing from the sunroof module assembly.
Make sure all seals and tracks are clean and free of debris. Use a
dampened lint free cloth with warm water to clean the seals. Use GM(TM) Glass Cleaner P/N 89021822 (in Canada 992727) to clean the tracks.
Open the sunshade to the full open position.
Open the sunroof window to the full open position.
Remove the four outer trim cover screws located outside of the sunroof module.
Remove the outer trim cover.
Remove the sunroof front trim cover. Refer to Sunroof Front Trim Cover Replacement in SI.
Have an assistant inside the vehicle to signal you when the leak is detected.
Perform a water test to verify the leak concern.
If a leak is found try to pinpoint the exact location that the water is entering. It could be any of the following four areas:
The leak may be entering from the roof panel and upper sunroof frame.
The leak may be entering from the upper sunroof frame seal and lower frame.
The leak may be entering from the sunroof glass and glass seal.
The water may be entering from around the sunroof glass clip holder. Dry off the sunroof glass outer sunroof frame and the roof panel.
Tape off around the entire outside perimeter of the upper sunroof frame assembly and outside the roof panel with masking tape.
Start water testing at the left front outer roof panel and sunroof frame by removing one inch of tape at a time until the source of the leak can be
pinpointed.
Proceed with the water test while removing the masking tape along the right front outer sunroof frame and roof panel until the complete area has been
tested.
Tape off the entire area around the outside perimeter of the sunroof glass and sunroof frame with masking tape. Proceed to water test up to the sunroof
glass and sunroof frame.
Start water testing while removing the masking tape from the left front corner of the sunroof glass; then proceed along to the right front corner of the
glass until the complete area has been tested.
Have an assistant signal you when the leak is detected.
Note the area you are water testing and mark the entry point of the water.
The leak could be from more than one area so determine which conditions apply and follow the recommended corrections below.
Condition 1
The leak condition is present between the roof panel (1) and the dry seal on the upper sunroof frame.
Cause 1
The dry foam seal on the upper sunroof frame assembly may have collapsed or has become distorted causing the leak.
Correction 1
Remove the sunroof module assembly and apply CRL7711 Sealer (a one-part butyl adhesive) to the outer edge of the upper sunroof frame using the
procedure listed below:
Remove the sunroof motor. Refer to Power Sunroof Motor Replacement in SI.
